Enum MemberObservationError 

pub enum MemberObservationError {
    StaleIncarnation {
        reason: String,
    },
    StaleCursor {
        watermark: u64,
        generation: u64,
    },
    FutureGenerationCursor {
        requested: u64,
        current: u64,
    },
    Unavailable {
        reason: String,
    },
    OutcomeRecordTooLarge {
        encoded_bytes: usize,
        max_bytes: usize,
    },
    Internal {
        reason: String,
    },
}

Typed failure vocabulary for member observation serving.

Variants

StaleIncarnation

The addressed host-member residency changed while the observation was being served. Maps to the wire StaleFence authority rejection.

Fields

reason: String

StaleCursor

The requested cursor position was pruned from the retained window (structurally ring-only in v1 — a durable log never overruns). Maps to the wire BridgeRejectionCause::StaleCursor.

Fields

watermark: u64

generation: u64

FutureGenerationCursor

The cursor names a generation this host never issued (g > current; restore-from-backup / split-brain shape). Fail closed — never serve under a future-generation cursor (FLAG-P6E-12). Maps to the wire BridgeRejectionCause::Internal with this diagnostic.

Fields

requested: u64

current: u64

Unavailable

The observation substrate cannot serve this session right now (unknown session, missing durable log, halted projection). Maps to the wire BridgeRejectionCause::Unavailable (ADJ-P4-7 vocabulary).

Fields

reason: String

OutcomeRecordTooLarge

A single outcome row cannot fit the independently bounded outcome protocol. Rejected before it reaches durable storage.

Fields

encoded_bytes: usize

max_bytes: usize

Internal

An invariant was violated while serving. Maps to Internal.

Fields

reason: String

Trait Implementations

impl Debug for MemberObservationError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for MemberObservationError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for MemberObservationError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.